Touch apparatus and touch detection method thereof

ABSTRACT

A touch apparatus according to an exemplary embodiment of the present invention includes: a touch sensor; and a touch controller that operates in a resonance driving mode during which a first driving signal is output for generation of a resonance signal of a stylus pen to the touch sensor and an idle mode during which the driving signal output to the touch sensor is stopped, and obtains first touch coordinate information from a detection signal input from the touch sensor during the resonance driving mode.

TECHNICAL FIELD

The present disclosure relates to a touch apparatus and a touchdetection method of the touch apparatus. More particularly, the presentinvention relates to a touch apparatus for detecting a touch by a styluspen, and a touch detection method of the touch apparatus.

BACKGROUND ART

Various terminals such as a mobile phone, a smart phone, a tablet PC, alaptop computer, a digital broadcasting terminal, a personal digitalassistant (PDA), a portable multimedia player (PMP), a navigator, andthe like are provided with a touch sensor.

In such a terminal, the touch sensor may be located on a display panelwhere an image is displayed, or may be disposed in one region of aterminal body. As a user interacts with the terminal by touching thetouch sensor, the terminal can provide an intuitive user interface tothe user.

The user may use a stylus pen for sophisticated touch input. Such astylus pen can transmit and receive signals through a touch sensor usingan electrical and/or magnetic method.

DISCLOSURE Technical Problem

Exemplary embodiments are intended to provide a touch apparatus and atouch detection method thereof that facilitate signal processing fordetecting touch coordinates.

Exemplary embodiments are intended to provide a touch apparatus and atouch detection method thereof to determine the type of a touch object.

Exemplary embodiments are intended to provide a touch apparatus withimproved touch detection performance and a touch detection methodthereof.

Technical Solution

In order achieve the above-stated or other purpose of the presentinvention, a touch apparatus according to a first exemplary embodimentof the present invention includes: a touch sensor; and a touchcontroller that operates in a resonance driving mode during which afirst driving signal is output for generation of a resonance signal of astylus pen to the touch sensor and an idle mode during which the drivingsignal output to the touch sensor is stopped, and obtains first touchcoordinate information from a detection signal input from the touchsensor during the resonance driving mode.

In the touch apparatus according to the first exemplary embodiment, thetouch controller obtains an effective signal by using a baseline signal,and the detection signal output from the touch sensor during theresonance driving mode, and obtains the first touch coordinateinformation from the effective signal.

In the touch apparatus according to the first exemplary embodiment, thetouch controller may determine a type of a touch object that generated atouch input by using the effective signal.

In the touch apparatus according to the first exemplary embodiment, thetouch controller may recognize the touch object as the stylus pen whenthe effective signal is a signal that corresponds to a resonance signalof the stylus pen.

In the touch apparatus according to the first exemplary embodiment, whena touch input with respect to the touch sensor is detected, the touchcontroller may determine a type of a touch object that generated thetouch input from the detection signal input from the touch sensor duringthe idle mode.

In the touch apparatus according to the first exemplary embodiment, afrequency of the first driving signal may correspond to a resonancefrequency of the stylus pen.

In the touch apparatus according to the first exemplary embodiment, thetouch controller may operate in a normal driving mode during which asecond driving signal of which a frequency is different from that of thefirst driving signal is output to the touch sensor.

In the touch apparatus according to the first exemplary embodiment, thetouch controller obtains second touch coordinate information by using adetection signal input from the touch sensor during the normal drivingmode.

In the touch apparatus according to the first exemplary embodiment, afrequency of the first driving signal in the resonance driving mode maybe different from a frequency of the second driving signal in the normaldriving mode.

A touch detection method of a touch apparatus according to a secondexemplary embodiment of the present invention includes: entering aresonance driving mode, and outputting a first driving signal forgeneration a resonance signal of a stylus pen to a touch sensor;receiving a detection signal from the touch sensor during the resonancedriving mode; obtaining first touch coordinate information from thedetection signal; and entering an idle mode, and stopping outputting ofa driving signal with respect to the touch sensor.

In the touch detection method of the touch apparatus according to thesecond exemplary embodiment of the present invention, the obtaining ofthe first touch coordinate information may include: obtaining aneffective signal by using a baseline signal, and the detection signalreceived from the touch sensor during the resonance driving mode; andobtaining the first touch coordinate information from the effectivesignal.

The touch detection method of the touch apparatus according to thesecond exemplary embodiment of the present invention may further includerecognizing a touch object that generated a touch input by using theeffective signal.

In the touch detection method of the touch apparatus according to thesecond exemplary embodiment of the present invention, the recognizing ofthe touch object may include recognizing the touch object as the styluspen when the effective signal is a signal corresponding to a resonancesignal of the stylus pen.

The touch detection method of the touch apparatus according to thesecond exemplary embodiment of the present invention may furtherinclude, while opening in the idle mode, determining a type of a touchobject that generated the touch input from the detection signal receivedfrom the touch sensor.

In the touch detection method of the touch apparatus according to thesecond exemplary embodiment of the present invention, the determining ofthe type of the touch object while operating in the idle mode mayinclude determining the touch object as the stylus pen when thedetection signal input from the touch sensor during the idle modeincludes a signal component that corresponds to a resonance signal ofthe stylus pen.

In the touch detection method of the touch apparatus according to thesecond exemplary embodiment of the present invention, a frequency of thefirst driving signal may correspond to a resonance frequency of thestylus pen.

The touch detection method of the touch apparatus according to thesecond exemplary embodiment of the present invention may furtherinclude: operating in a normal driving mode during which a seconddriving signal of which a frequency is different from the frequency ofthe first driving signal is output to the touch sensor; and obtainingsecond touch coordinate information by using a detection signal inputfrom the touch sensor during the normal driving mode.

In the touch detection method of the touch apparatus according to thesecond exemplary embodiment of the present invention, the first drivingsignal in the resonance driving mode may have a different frequency froma frequency of the second driving signal in the normal driving mode.

A touch apparatus according to a third exemplary embodiment of thepresent invention includes: a touch sensor that includes a plurality offirst touch electrodes for obtaining a coordinate value in a firstcoordinate axis, and a plurality of second touch electrodes forobtaining a coordinate value in a second coordinate axis thatperpendicularly crosses the first coordinate axis; and a touchcontroller that operates in a driving mode during which a driving signalfor generation of a resonance signal of a stylus pen is output to thetouch sensor, and an idle mode during which the outputting of thedriving signal is stopped, and obtains touch coordinate information froma detection signal input from the touch sensor during a driving modesection during which the touch controller operates in the driving mode.

In the touch apparatus according to the third exemplary embodiment ofthe present invention, the touch controller may simultaneously outputthe driving signal to the plurality of first touch electrodes during afirst driving mode section and may simultaneously output the drivingsignal to the plurality of second touch electrodes during a seconddriving mode section, which is the next driving mode section of thefirst driving mode section, and may obtain the touch coordinateinformation by using a detection signal input from at least one type oftouch electrodes among the plurality of first touch electrodes and theplurality of second touch electrodes during the first and second drivingmode sections.

In the touch apparatus according to the third exemplary embodiment ofthe present invention, the touch controller may obtain a coordinatevalue in the second coordinate axis among the touch coordinateinformation by using detection signals input from the plurality ofsecond touch electrodes during the first driving mode section, and mayobtain a coordinate value in the first coordinate axis among the touchcoordinate information by using detection signals input from theplurality of first touch electrodes during the second driving modesection.

In the touch apparatus according to the third exemplary embodiment ofthe present invention, the touch controller may obtain a coordinatevalue in the first coordinate axis among the touch coordinateinformation by using detection signals input from the plurality of firsttouch electrodes during the first driving mode section, and may obtain acoordinate value in the second coordinate axis among the touchcoordinate information by using detection signals input from theplurality of second touch electrodes during the second driving modesection.

In the touch apparatus according to the third exemplary embodiment ofthe present invention, the touch controller may simultaneously outputthe driving signal to the plurality of first and second touchelectrodes, and obtains the touch coordinate information by using adetection signal input from the plurality of touch electrodes and/or theplurality of second touch electrodes during the driving mode.

In the touch apparatus according to the third exemplary embodiment ofthe present invention, the touch controller may obtain a coordinatevalue in the second coordinate axis among the touch coordinateinformation by using detection signals received from the plurality ofsecond touch electrodes, and may obtain a coordinate value in the firstcoordinate axis among the touch coordinate information by usingdetection signals input from the plurality of first touch electrodesduring the driving mode section.

In the touch apparatus according to the third exemplary embodiment ofthe present invention, the touch controller may obtain a coordinatevalue in the first coordinate axis among the touch coordinateinformation by using detection signals input from the plurality of firsttouch electrodes during the first driving mode section, and may obtain acoordinate value in the second coordinate axis among the touchcoordinate information by using detection signals input from theplurality of second touch electrodes during a second driving modesection, which is a driving mode section next to the first driving modesection.

In the touch apparatus according to the third exemplary embodiment ofthe present invention, the touch controller may simultaneously outputthe driving signal to the plurality of first touch electrodes during thedriving mode section and obtains a coordinate value in the secondcoordinate axis among the touch coordinate information by usingdetection signals input from the plurality of second touch electrodesduring the driving mode, and may obtain a coordinate value in the firstcoordinate axis among the touch coordinate information by usingdetection signals input from the plurality of first touch electrodes foran idle mode section during which the touch controller operations in theidle mode, which is consecutive to the driving mode section.

In the touch apparatus according to the third exemplary embodiment ofthe present invention, the touch controller may determine a type of atouch object that generated the touch input by using a detection signalreceived from the touch sensor while operating in the idle mode.

In addition, a touch apparatus according to a fourth exemplar embodimentof the present invention includes: a touch sensor that includes aplurality of touch electrodes that are arranged in a dot matrix format;and a touch controller that operates in a driving mode during which adriving signal for generation of a resonance signal of a stylus pen isoutput to the plurality of touch sensors, and obtains touch coordinateinformation from a detection signal input from the touch sensor during adriving mode section during which the touch controller operates in thedriving mode.

In addition, according to a fifth exemplary embodiment of the presentinvention provides a touch detection method of a touch apparatus that isprovided with a touch sensor that includes a plurality of first touchelectrodes for obtaining a coordinate value in a first coordinate axisand a plurality of second touch electrodes for obtaining a coordinatevalue in a second coordinate axis that perpendicularly crosses the firstcoordinate axis, is provided. The touch detection method includes:entering a first driving mode section, and simultaneously outputting adriving signal for generation of a resonance signal of a stylus pen tothe plurality of first touch electrodes; obtaining a first coordinatevalue that constitutes touch coordinate information by using a detectionsignal input from at least one type of touch electrode among theplurality of first touch electrodes and the plurality of second touchelectrodes during the first driving mode section; entering a seconddriving mode section, and simultaneously outputting the driving signalto the plurality of second touch electrodes; and obtaining a secondcoordinate value that constitutes the touch coordinate information byusing a detection signal input from the plurality of first touchelectrodes and/or the plurality of second touch electrodes during thesecond driving mode section.

In the touch detection method according to the fifth exemplaryembodiment, the obtaining the first coordinate value comprises obtainingthe first coordinate value in the second coordinate axis among the touchcoordinate information by using detection signals input from theplurality of second touch electrodes, and the obtaining the secondcoordinate value comprises obtaining the second coordinate value in thefirst coordinate axis among the touch coordinate information by usingdetection signals input from the plurality of first touch electrodes.

In the touch detection method according to the fifth exemplaryembodiment, the obtaining the first coordinate value comprises obtainingthe first coordinate value in the first coordinate axis among the touchcoordinate information by using detection signals input from theplurality of first touch electrodes, and the obtaining the secondcoordinate value comprises obtaining the second coordinate value in thesecond coordinate axis among the touch coordinate information by usingdetection signals input from the plurality of second touch electrodes.

The touch detection method according to the fifth exemplary embodimentmay further include: when entering an idle mode section aftertermination of the first driving mode section, disabling outputting ofthe driving signal; and determining a type of a touch object thatgenerated the touch input by using a detection signal received from theplurality of first touch electrodes or the plurality of second touchelectrodes during the idle mode section.

In addition, according to a sixth exemplary embodiment of the presentinvention, a touch detection method of a touch apparatus provided with atouch sensor that includes a plurality of first touch electrodes forobtaining a coordinate value in a first coordinate axis, and a pluralityof second touch electrodes for obtaining a coordinate value in a secondcoordinate axis that perpendicularly crosses the first coordinate axis,is provided. The touch detection method includes: entering a drivingmode section, and simultaneously outputting a driving signal forgeneration of a resonance signal of a stylus pen to the plurality offirst and second touch electrode; and obtaining the touch coordinateinformation by using a detection signal input from at least one type oftouch electrode among the plurality of first touch electrodes and theplurality of second touch electrodes during the driving mode section.

In the touch detection method according to the sixth exemplaryembodiment, the obtaining the touch coordinate information may include:obtaining a coordinate value in the second coordinate axis among thetouch coordinate information by using detection signals received fromthe plurality of second touch electrodes during the driving modesection; and obtaining a coordinate value in the first coordinate axisamong the touch coordinate information by using detection signalsreceived from the plurality of first touch electrodes during the drivingmode section.

In the touch detection method according to the sixth exemplaryembodiment, the obtaining the touch coordinate information may include:obtaining a coordinate value in the first coordinate axis among thetouch coordinate information by using detection signals received fromthe plurality of first touch electrodes when the driving mode section isa first driving mode section; and obtaining a coordinate value in thesecond coordinate axis among the touch coordinate information by usingdetection signals received from the plurality of second touch electrodeswhen the driving mode section is a second driving mode section.

In the touch detection method according to the sixth exemplaryembodiment, the obtaining the touch coordinate information may include:obtaining a coordinate value in the first coordinate axis among thetouch coordinate information by using detection signals received fromthe plurality of first touch electrodes during the driving mode section,and the touch detection method may further include, when entering anidle mode during which an output of the driving signal is disabled,obtaining a coordinate value in the second coordinate axis among thetouch coordinate information by using detection signals received fromthe plurality of second touch electrodes when the driving mode sectionis a second driving mode section.

The touch detection method according to the sixth exemplary embodimentmay further include: when entering an idle mode section aftertermination of the driving mode section, disabling outputting of thedriving signal; and determining a type of a touch object that generatedthe touch input by using a detection signal received from the pluralityof first touch electrodes or the plurality of second touch electrodesduring the idle mode section.

Advantageous Effects

The touch apparatus and the touch detection method thereof according tothe present disclosure may improve touch detection performance byincreasing intensity of a resonance signal generated from a resonancestylus pen.

In addition, the touch apparatus and the touch detection method thereofaccording to the present disclosure improve the signal-to-noise ratio(SNR) of an effective signal used for detecting touch coordinates, andsecure sufficient touch signal processing time.

In addition, the touch apparatus and the touch detection method thereofaccording to the present disclosure can promptly determine a type of atouch object.

DESCRIPTION OF THE DRAWINGS

FIG. 1 schematically illustrates a touch apparatus according to anexemplary embodiment of the present invention.

FIG. 2 illustrates an example of touch input detection of a stylus penof the touch apparatus according to the exemplary embodiment of thepresent invention.

FIG. 3 is provided for description of generation of a resonance signalof the stylus pen of FIG. 2 .

FIG. 4 is provided for description of a touch coordinate informationacquisition method of the touch apparatus according to the exemplaryembodiment of the present invention.

FIG. 5 illustrates another example of the driving mode of the touchapparatus according to the exemplary embodiment of the presentinvention.

FIG. 6 schematically illustrates a touch detection method of the touchapparatus according to the exemplary embodiment of the presentinvention.

FIG. 7 schematically illustrates a touch detection method according toanother exemplary embodiment of the present invention.

FIG. 8 illustrates an example of a driving signal output to touchelectrodes according to the touch detection method of FIG. 7 .

FIG. 9 schematically illustrates a touch detection method according toanother exemplary embodiment of the present invention.

FIG. 10 illustrates an example of a driving signal output to touchelectrodes according to the touch detection method of FIG. 9 .

FIG. 11 schematically illustrates a touch detection method according toanother exemplary embodiment of the present invention.

FIG. 12 shows an example of a driving signal output to touch electrodesaccording to the touch detection method of FIG. 11 .

FIG. 13 schematically illustrates a touch detection method according toanother exemplary embodiment of the present invention.

FIG. 14 illustrates an example of a driving signal output to touchelectrodes according to the touch detection method of FIG. 13 .

FIG. 15 schematically illustrates a touch detection method according toanother exemplary embodiment of the present invention.

FIG. 16 illustrates an example of a driving signal output to touchelectrodes according to the touch detection method of FIG. 15 .

FIG. 17 illustrates another example of a touch apparatus according toanother exemplary embodiment of the present invention.

FIG. 18 schematically illustrates a touch detection method according toanother exemplary embodiment of the present invention.

MODE FOR INVENTION

The present invention will be described more fully hereinafter withreference to the accompanying drawings, in which exemplary embodimentsof the invention are shown. As those skilled in the art would realize,the described embodiments may be modified in various different ways, allwithout departing from the spirit or scope of the present invention.

In describing the present invention, parts that are not related to thedescription will be omitted. Like reference numerals generally designatelike elements throughout the specification.

In addition, unless explicitly described to the contrary, the word“comprise” and variations such as “comprises” or “comprising” will beunderstood to imply the inclusion of stated elements but not theexclusion of any other elements.

Hereinafter, a touch apparatus and a touch detection method of the touchapparatus according to exemplary embodiments will be described withreference to the accompanying drawings.

FIG. 1 schematically illustrates a touch apparatus according to anexemplary embodiment of the present invention, and FIG. 2 illustrates anexample of touch input detection of a stylus pen of the touch apparatusaccording to the exemplary embodiment of the present invention. FIG. 3is provided for description of generation of a resonance signal of thestylus pen of FIG. 2 , and FIG. 4 is provided for description of a touchcoordinate information acquisition method of the touch apparatusaccording to the exemplary embodiment of the present invention.

Referring to FIG. 1 and FIG. 2 , a touch apparatus 100 may include atouch panel 110 and a touch controller 120.

The touch panel 110 may include a substrate 111 and a touch sensor 112that is disposed on the substrate 111.

The touch sensor 112 may be used to detect a touch input (direct touchor proximity touch) by a touch object. The touch sensor 112 operates byreceiving a driving signal from the touch controller 120, and may outputa detection signal corresponding to a touch detection result to thetouch controller 120.

The stylus pen 200 generates a resonance signal responding to thedriving signal applied to the touch sensor 112, and the touch sensor 112may detect a touch by detecting the resonance signal generated by thestylus pen 200.

For example, in FIG. 2 , the stylus pen 200 may operate in anelectrically coupled resonance (ECR) method. The ECR-type stylus pen 200may include a conductive tip 210, a resonance circuit 220, a ground 230,and a body 240.

The conductive tip 210 is at least partially formed of a conductivematerial (e.g., metal, conductive rubber, conductive fabric, conductivesilicone, etc.), and may be electrically connected to the resonancecircuit 220.

The resonance circuit 220 is an LC resonance circuit, and may resonantwith the driving signal received from the touch sensor 112 of the touchapparatus 100. A resonance signal (hereinafter, referred to as “penresonance signal”) generated by the resonance circuit 220 resonatingwith the driving signal of the touch sensor 112 may be output to thetouch sensor 112 through the conductive tip 210. As shown in FIG. 3 ,the resonance circuit 220 may output a pen resonance signal due toresonance through the conductive tip 210 in a section in which a drivingsignal is input from the touch sensor 112 and some sections thereafter.The resonance circuit 220 is disposed in the body 240, and may beelectrically connected to the ground 230.

Such an ECR-type stylus pen 200 may generate a touch input bytransmitting the pen resonance signal generated responding to thedriving signal that is applied to the touch sensor 120 to the touchsensor 112 through the electrically coupled resonance by the conductivetip 210. Thus, the touch controller 120 may output a driving signal thatincludes a frequency signal (e.g., a sine wave, a square wave, and thelike), which corresponds to a resonance frequency of the stylus pen 200,to the touch sensor 112 to thereby generate the pen resonance signal ofthe stylus pen 200.

The touch sensor 112 may include a plurality of touch electrodes fordetection of a touch input. For example, in FIG. 1 , the touch sensor112 may include a plurality of first touch electrodes 301 and aplurality of second touch electrodes 302. In the present document, theplurality of first touch electrodes 301 are touch electrodes foracquiring coordinate values in a first coordinate axis (e.g., Ycoordinate axis), and the plurality of second touch electrodes 302 aretouch electrodes for acquiring coordinate values in a second coordinateaxis (e.g., X coordinate axis) that perpendicularly crosses the firstcoordinate axis.

The respective touch electrodes 301 and 302 of the touch sensor 112, theconductive tip 210 of the stylus pen 200, and the substrate 111 of thetouch panel 110 form capacitance Cx by the ECR, and the touch sensor 112may detect a touch input by outputting an electrical signal (detectionsignal) corresponding to the capacitance Cx.

The touch sensor 112 may be used to detect a touch input by a touchobject (e.g., a user's body (a finger and the like), or a passive oractive stylus pen operating by a capacitive coupling method other thanthe ECR method) other than the ECR-type stylus pen 20.

Meanwhile, in FIG. 2 , a case that the touch sensor 112 is used todetect a touch input of the stylus pen 200 driven by the ECR method isexemplarily illustrated, but the present invention is not limitedthereto. The touch sensor 112 may be modified to detect a touch input ofanother type of stylus pen that generates a resonance signal respondingto a driving signal applied to the touch sensor 112, and this is wellknown to a person of ordinary skill in the art.

In the following, in order to distinguish a stylus pen operating in amanner that generates a resonance signal in response to a driving signalapplied to the touch sensor 112, as in the ECR method described above,from a passive or active type stylus pen operating in a differentmanner, a stylus pen that generates a resonance signal in response to adriving signal applied to the touch sensor 112 is collectively referredto as a resonant stylus pen.

The touch controller 120 controls driving of the touch sensor 112, andmay output touch data that includes touch coordinate informationcorresponding to a touch detection result of the touch sensor 112.

Regardless of an operating method, when the resonance stylus pen 200touches the touch apparatus 100, as shown in FIG. 3 , the resonancestylus pen 200 may output a pen resonance signal in a touch driving modesection during which a driving signal is applied to the touch sensor 112and some sections of an idle mode section during which the drivingsignal is disabled. Thus, the touch controller 120 receives detectionsignals of touch electrodes that form the touch sensor 112 during thetouch driving mode section and some sections of the idle mode section,and may acquire position information (hereinafter, referred to as touchcoordinate information) of a position where a touch of the resonancestylus pen 200 is generated.

Referring to FIG. 4 , a detection signal 11 received from touchelectrodes during the driving mode section during which driving signalsare output to the touch electrodes may not only include a signal 13corresponding to a pen resonance signal of the resonance stylus pen 200,but may also include a signal 12 corresponding to a driving signalapplied to the touch sensor 112. Thus, in order to acquire touchcoordinate information from the detection signal 11 received from thetouch sensor 112 during the driving mode section, a valid signal used intouch coordinate detection, that is, a signal corresponding to the penresonance signal 13 of the resonance stylus pen 200, needs to beextracted. For this, the touch controller 120 may extract a valid signal13 from the detection signal 11 and a baseline signal 12. Here, thebaseline signal 12 may store and use the detection signal 12 receivedfrom a touch electrode when no touch is generated, or a detection signalreceived from a touch electrode other than a touch electrode where acurrent touch needs to be detected may be used.

That is, the touch controller 120 may acquire a valid signal component(e.g., amplitude or signal intensity) that corresponds to a resonancesignal of the resonance stylus pen 200 from a signal componentdifference between the baseline signal 12 and a detection signal 11 thatis actually received from the touch sensor 112.

When the valid signal component is acquired through such a method, thetouch controller 120 may acquire touch coordinate information throughcomparison with a predetermined threshold value. Here, signal componentsof the baseline signal 12 used to detect the valid signal component maybe pre-acquired by measuring a detection signal output from the touchsensor 112 when no touch is generated, may be estimated from a drivingsignal output to the touch sensor 112 during the driving mode, or may bea detection signal received from another touch sensor in a state whereno touch is generated.

Meanwhile, the touch sensor 112 may be used to detect a touch input by atouch object (e.g., a user's body, or a stylus pen operating by a methodother than resonance, and the like) the resonance stylus pen 200. Inthis case, valid signal components extracted from the detection signalof the touch sensor 112 input during the driving mode may be a signalcomponent that corresponds to a capacitance change due to a touch by atouch object other than the resonance stylus pen 200. Thus, the touchcontroller 120 may additionally perform a process for determining a typeof a touch object by using the detection signal output from the touchsensor 112.

For example, the touch controller 120 may use valid signal componentsextracted from the detection signal of the touch sensor 112, receivedduring the touch driving mode, to determine a type of a touch object.When a signal component corresponding to a resonance signal of thestylus pen 200 is detected from the valid signal (refer to referencenumeral 13 of FIG. 4 ) extracted from the detection signal of the touchcontroller 120, the touch controller 120 may determine the touch objectas a resonance stylus pen. On the contrary, when a signal componentcorresponding to the resonance signal of the resonance stylus pen is notdetected from the valid signal 13, the touch controller 120 maydetermine that the type of the touch object is not a resonant stylus penbut a user's body part or another type of stylus pen.

In addition, for example, the touch controller 120 may determine thetype of the touch object that generated the touch input from thedetection signal received from the touch sensor 112 during the idle modesection. When a touch input by the resonance stylus pen 200 occurs, theresonance signal of the resonance stylus pen 200 continues not onlyduring the touch driving mode section, but also during some subsequentidle mode sections. Thus, the resonance signal of the resonance styluspen 200 affects the detection signal of the touch sensor 112 even in theidle mode. Accordingly, when a touch input is detected in the touchdriving mode, the touch controller 120 may determine the type of thetouch object that generated the touch input by analyzing the detectionsignal in the subsequent idle mode section.

Meanwhile, in FIG. 3 , a case in which the driving mode of the touchsensor 112 is divided into a touch driving mode that outputs a drivingsignal for generating a resonance signal and an idle mode is illustratedas an example, but the present invention is not limited thereto. Forexample, when the touch sensor 112 is commonly used to detect a touch bya resonance stylus pen and a touch by another touch object (user's bodypart or other type of stylus pen), the touch driving mode of the touchsensor may be divided into a normal driving mode and a resonance drivingmode as shown in FIG. 5 .

FIG. 5 illustrates another example of the driving mode of the touchapparatus according to the exemplary embodiment of the presentinvention.

Referring to FIG. 5 , the driving mode of the touch sensor 112 mayinclude a normal driving mode, which is a touch driving mode, aresonance driving mode, and an idle mode.

The normal driving mode is a mode during which a driving signal isapplied to the touch sensor 112 for detecting a touch input by touchobjects (user's body parts or other types of stylus pens) other than theresonance stylus pen. During the normal driving mode, the touchcontroller 120 outputs the driving signal to the touch sensor 112, andmay acquire touch coordinate information based on signal intensity ofthe detection signal received from the touch sensor 112.

The resonance driving mode is a mode that corresponds to the touchdriving mode of FIG. 3 , and is a mode during which a driving signal isapplied to the touch sensor 112 for generating a resonance signal of theresonance stylus pen. During the resonance driving mode, the touchcontroller 120 outputs the driving signal to the touch sensor 112, andmay acquire touch coordinate information by a touch input of theresonance stylus pen from the detection signal received from the touchsensor 112. In addition, during the resonance driving mode, the touchcontroller 120 may acquire touch coordinate information corresponding toa touch input by a user's body part from the detection signal receivedfrom the touch sensor 112.

Meanwhile, a frequency of the driving signal applied to the touch sensor112 corresponds to a resonance frequency of the resonance stylus pen.For example, a frequency of the driving signal output to the touchsensor 112 during the resonance driving mode may be around 400 kHz. Onthe contrary, a frequency of the driving signal output to the touchsensor 112 during the normal driving mode is set to be different fromthe resonance frequency of the resonance stylus pen. For example, afrequency of the driving signal output to the touch sensor 112 duringthe normal driving mode may be set to be around 200 kHz. The frequencysetting of the driving signal is only an example, and may be set to avalue different from the above.

Referring to FIG. 2 , impedance by the capacitance Cx is decreased asthe frequency of the driving signal applied to the touch sensor 112 isincreased. Accordingly, receiving sensitivity of the touch sensor 112receiving the pen resonance signal of the resonance stylus pen 200increases as the frequency of the driving signal applied to the touchsensor 112 increases, and the signal-to-noise ratio (SNR) of the penresonance signal received by the touch sensor 112 may be improved. Thus,in order to detect the pen resonance signal of the resonance stylus pen,it is necessary to set the frequency of the driving signal to be as inthe resonance driving mode of FIG. 5 .

Meanwhile, in the resonance driving mode during which the frequency ofthe driving signal applied to the touch sensor 112 is set to be high, atouch input by the resonance stylus pen and a touch input by other typesof touch objects (user's body parts or other types of stylus pens) bothcan be detected. On the other hand, in the normal driving mode duringwhich the frequency of the driving signal applied to the touch sensor112 is set to be relatively low compared to the resonance driving mode,even if a touch input by the resonant stylus pen occurs, a signalcomponent corresponding to the pen resonance signal may hardly beincluded in the detection signal of the touch sensor 112.

The idle mode is a mode during which the driving signal applied to thetouch sensor 112 is disabled. When a touch input is detected in theresonance driving mode, the touch controller 120 may determine the typeof the touch object that generated the touch input by analyzing adetection signal in the subsequent idle mode section. That is, when asignal component corresponding to the resonance signal of the resonantstylus pen is detected from the detection signal received from the touchsensor 112 even after entering the idle mode section, the type of thetouch object may be determined as a resonant stylus pen.

The touch apparatus 100 having the above-described structure may becoupled to an electronic device such as a display and used as an inputdevice.

FIG. 6 schematically illustrates a touch detection method of the touchapparatus according to the exemplary embodiment of the presentinvention. A touch detection method shown in FIG. 6 may be executed bythe touch controller 120 of the touch apparatus 100 described withreference to FIG. 1 to FIG. 5 .

Referring to FIG. 6 , the touch apparatus 100 according to the exemplaryembodiment of the present invention applies a driving signal to thetouch sensor 112 (S11), and receives a detection signal from the touchsensor (S12) as the touch apparatus 100 enters the touch driving mode(S10).

When receiving the detection signal from the touch sensor 112 in thetouch driving mode section, the touch apparatus 100 detects an effectivesignal component corresponding to a pen resonance signal from thereceived detection signal (S13), and acquires touch coordinateinformation by analyzing the detected effective signal component (S14).

In S13 and S14, the touch apparatus 100 acquires the effective signalcomponent corresponding to the pen resonance signal from a signalcomponent difference between a baseline signal and the detection signalreceived from the touch sensor 112, and acquires touch coordinateinformation due to an ECR pen by analyzing the acquired effective signalcomponent.

After that, the touch apparatus 100 enters the idle mode (S150), anddisables the driving signal output to the touch sensor 112 (S16).

The touch apparatus 100 may perform continuous touch detection byrepeating S10 and S16 while the touch apparatus 100 is driven.

As described above, according to the touch detection method describedreferring to FIG. 6 , the touch apparatus 100 detects the touchcoordinate information from the detection signal received from the touchsensor 112 for the touch driving mode during which the driving signal isoutput to the touch sensor 112 rather than for the idle mode duringwhich the driving signal is not applied to the touch sensor 112.Accordingly, compared to the conventional method of acquiring the touchcoordinate information of the resonance stylus pen by receiving thedetection signal while the driving signal is not applied to the touchsensor, the SNR of the effective signal used for touch coordinatedetection is improved, and sufficient touch signal processing time canbe secured.

Meanwhile, intensity of the resonance signal of the stylus pen 200,generated responding to the driving signal of the touch sensor 112 maybe increased as the number of driving channels to which the same drivingsignal is simultaneously applied is increased in the touch sensor 112.Thus, in the exemplary embodiment of the present invention to bedescribed later, the intensity of the resonance signal generated by theresonance stylus pen 200 may be increased by increasing the number ofdriving channels to which the driving signal is simultaneously applied.For example, the touch controller 120 may simultaneously output the samedriving signal to all of the plurality of first touch electrodes 301and/or to all of the plurality of second touch electrodes 302.

FIG. 7 schematically illustrates a touch detection method according toanother exemplary embodiment of the present invention. In addition, FIG.8 illustrates an example of a driving signal output to touch electrodesaccording to the touch detection method of FIG. 7 .

The touch detection method of FIG. 7 is a touch detection method in acase that the touch apparatus 100 described with reference to FIG. 1 toFIG. 5 operates in a mutual capacitance manner, and may be performed bythe touch controller 120. In addition, first and second driving modesections in FIG. 7 and FIG. 8 may be sections corresponding to the touchdriving mode of FIG. 3 or the resonance driving mode of FIG. 5 , andfirst and second idle mode sections may be sections corresponding to theidle modes of FIG. 3 and FIG. 5 .

Referring to FIG. 7 and FIG. 8 , the touch controller 120 enters thefirst driving mode section (S101), and simultaneously applies a drivingsignal for generation of a resonance signal of the resonance stylus pen200 to all of the first touch electrodes 301 that form the touch sensor112 (S102).

In addition, the touch controller 120 receives detection signals fromthe second touch electrodes 302 during the first driving mode section(S103), and acquires touch coordinate information (coordinate values inthe second coordinate axis (e.g., X-coordinate axis) at a position wherea touch of the resonance stylus pen 200 by using the received detectionsignal (S104).

After that, when the first driving mode section is terminated and thetouch controller 120 enters the first idle mode section (S105), thetouch controller 112 disables the driving signal output to the touchsensor 112. Meanwhile, the touch controller 120 receives detectionsignals from the plurality of first touch electrodes 301 or theplurality of first and second touch electrodes 301 and 302 during thefirst idle mode section, and may determine the type of the touch objectthat generated the touch input by analyzing the received detectionsignals.

In addition, when the first idle mode section is terminated and thetouch controller 120 enters the second driving mode section (S106), thetouch sensor 112 simultaneously applies a driving signal for generationof a resonance signal of the resonance stylus pen 200 to all of thesecond touch electrodes 302 that form the touch sensor 112 (S107).

In addition, the touch controller 120 receives a detection signal fromthe first touch electrode 301 during the second driving mode section(S108), and acquires touch coordinate information (i.e., coordinatevalues of touch coordinate information (i.e., first coordinate axis(e.g., Y-coordinate axis)) at a position where a touch of the resonancestylus pen 200 is generated by using the received detection signal(S109).

When the second driving mode section is terminated and the touchcontroller 120 enters the second idle node section (S110), the touchcontroller 120 disables the driving signal output to the touch sensor112. Meanwhile, the touch controller 120 receives detection signals fromonly the plurality of second touch electrodes 302 or from all of thefirst and second touch electrodes 301 and 302 during the second idlemode section, and may determine the type of the touch object thatgenerated the touch input by analyzing the received detection signal.

The touch apparatus 100 may perform continuous touch detection byrepeating S101 and S110 while the touch apparatus 100 is driven.

As described above, in the touch detection method described withreference to FIG. 7 and FIG. 8 , the same driving signal issimultaneously applied to all the first touch electrodes 301 in thefirst driving mode section, and the same driving signal issimultaneously applied to all the second touch electrodes 302 in thesecond driving mode section such that intensity of the resonance signalof the stylus pen 200, responding to the driving signal, is improved.

In addition, compared to the conventional method of acquiring the touchcoordinate information of the resonance stylus pen by receiving thedetection signal while the driving signal is not applied to the touchsensor, the SNR of the effective signal used for touch coordinatedetection is improved, and sufficient touch signal processing time canbe secured by detecting the touch coordinate information from thedetection signal received from the touch sensor 112 for the driving modeduring which the driving signal is output to the touch sensor 112.

On the other hand, in a touch apparatus operating in a mutualcapacitance method, when simultaneously outputting the same drivingsignal for generating a resonance signal of the stylus pen 200 to alltouch electrodes extending in the same direction, only the touchcoordinate value for one coordinate axis can be obtained. For example,when a driving signal is simultaneously applied to the first touchelectrodes 301, the touch coordinate value of the first coordinate axis(e.g., Y-coordinate axis) divided by the first touch electrode 301cannot be obtained, and thus only touch coordinate values at the secondcoordinate axis (e.g., X-coordinate axis) divided by the second touchelectrode 302 can be obtained.

Thus, in the touch detection method described with reference to FIG. 7and FIG. 8 , in order to solve the above stated problem, touchcoordinate values in the second coordinate axis are obtained by usingdetection signals of the second touch electrodes 302 in the firstdriving mode section during which the driving signal is simultaneouslyapplied to the first touch electrodes 301, and touch coordinate valuesin the first coordinate axis are obtained by using detection signals ofthe first touch electrode 301 in the second driving mode section duringwhich the driving signal is simultaneously applied to the second touchelectrodes 302.

FIG. 9 schematically illustrates a touch detection method according toanother exemplary embodiment of the present invention. FIG. 10illustrates an example of a driving signal output to touch electrodesaccording to the touch detection method of FIG. 9 .

The touch detection method of FIG. 9 is a touch detection method in acase that the touch apparatus 100 described with reference to FIG. 1 toFIG. 4 operates in the mutual capacitance method, and may be performedby the touch controller 120. In addition, in FIG. 9 and FIG. 10 , adriving mode section may be a section corresponding to the touch drivingmode of FIG. 3 or the resonance driving mode of FIG. 5 , and an idlemode section may be a section corresponding to the idle modes of FIG. 3and FIG. 5 .

Referring to FIG. 9 and FIG. 10 , the touch controller 120 enters adriving mode (S201), and simultaneously applies a driving signal forgenerating a resonance signal of the resonance stylus pen 200 to all ofthe first touch electrodes 301 that form the touch sensor 112 (S201).

In addition, the touch controller 120 receives detection signals fromthe second touch electrodes 302 during the driving mode section (S203),and obtains touch coordinate information (i.e., coordinate values at aposition in the second coordinate axis (e.g., X-coordinate axis)) at aposition where a touch of the resonance stylus pen 20 is generated byusing the received detection signal (S204).

After that, the driving mode section is terminated and thus the touchcontroller 120 enters the idle mode section (S205), and the touchcontroller 120 disables the driving signal output to the touch sensor112. In addition, the touch controller 120 receives detection signalsfrom the first touch electrodes 301 for a predetermined time periodafter entering the idle mode section (S206), and obtains touchcoordinate information (i.e., coordinate values in the first coordinateaxis (e.g., Y-coordinate axis) at a position where a touch of the styluspen 200 is generated by using the received detection signal (S207).

Meanwhile, the touch controller 120 receives detection signals from onlythe plurality of first touch electrodes 301 or from all of the first andsecond touch electrodes 301 and 302 during the idle mode section, andmay determine the type of the touch object that generated the touchinput by analyzing the received detection signal.

The touch apparatus 100 may perform continuous touch detection byrepeating S201 and S207 while the touch apparatus 100 is driven.

As described above, in the touch detection method described withreference to FIG. 9 and FIG. 10 , the same driving signal is applied toall of the first and second touch electrodes 301 and 302 in the drivingmode section such that intensity of the resonance signal of theresonance stylus pen, responding to the driving signal, can be improved.

In addition, some touch coordinate information is obtained by processingthe detection signals of the plurality of second touch electrodes 302during the driving mode in which the driving signal is output to thetouch sensor 112, and remaining touch coordinate information is obtainedby processing the detection signals of the plurality of first touchelectrodes 301 during the idle mode such that the SNR of an effectivesignal used for touch coordinate detection can be improved, andsufficient touch signal processing time can be secured.

In addition, in order to solve a coordinate acquisition problem thatoccurs due to simultaneous application of the same driving signal to allthe driving electrodes, a touch coordinate value in the secondcoordinate axis is obtained by using the detection signals of the secondtouch electrodes 302 in the driving mode section, and a touch coordinatevalue in the first coordinate axis is obtained by using the detectionsignals of the first touch electrodes 301 in some section during which aresonance signal is received in the idle mode section.

Meanwhile, for the touch apparatus operating in the mutual capacitancemethod to obtain touch coordinate information by using the touchdetection methods described with reference to FIG. 7 and FIG. 9 , thetouch apparatus needs a driving signal for generation of a resonancesignal of the stylus pen 200 not only with respect to the touchelectrodes operating as driving electrodes but also with respect totouch electrodes operating as detection electrodes. In addition, thetouch apparatus needs to receive and process detection signals not onlywith respect to touch electrodes operating as detection electrodes, butalso with respect to touch electrodes operating as driving electrodes.Thus, in order to implement the touch detection method described withreference to FIG. 7 and FIG. 9 , the touch controller 120 may bedesigned to enable output of a driving signal, receiving of a detectionsignal, and acquisition of touch coordinate information using the samefor all of the plurality of first touch electrodes 301 and the pluralityof second touch electrodes 302.

FIG. 11 schematically illustrates a touch detection method according toanother exemplary embodiment of the present invention. In addition, FIG.12 shows an example of a driving signal output to touch electrodesaccording to the touch detection method of FIG. 11 .

The touch detection method of FIG. 11 illustrates a case that the touchapparatus 100 described with reference to FIG. 1 to FIG. 4 operates in aself-capacitive method, and may be performed by the touch controller120. In addition, first and second driving mode sections in FIG. 11 andFIG. 12 are sections corresponding to the touch driving mode of FIG. 3or the resonance driving mode of FIG. 5 , and first and second idle modesections are sections corresponding to the idle modes of FIG. 3 and FIG.5 .

Referring to FIG. 11 and FIG. 12 , the touch controller 120 enters thefirst driving mode section (S301), and the touch controller 120simultaneously applies a driving signal for generation of a resonancesignal of the resonance stylus pen 200 to all of the first touchelectrodes 301 that form the touch sensor 112 (S302).

In addition, the touch controller 120 receives a detection signal (S303)from the first touch electrodes 301 during the first driving modesection, and obtains touch coordinate information (i.e., a coordinatevalue in the first coordinate axis (e.g., Y-coordinate axis)) at aposition where a touch of the resonance stylus pen 200 is generated byusing the received detection signal (S304).

After that, when the touch controller 120 enters the first idle modesection after termination of the first driving mode section (S305), thetouch controller 120 disables the driving signal output to the touchsensor 112. Meanwhile, the touch controller 120 receives detectionsignals from only the plurality of second touch electrodes 302 or fromall of the first and second touch electrodes 301 and 302 during thefirst idle mode section, and may determine the type of the touch objectthat generated the touch input by analyzing the received detectionsignal.

In addition, when the touch controller 120 enters the second drivingmode section after termination of the first idle mode section (S306),the touch controller 120 simultaneously applies the driving signal forgeneration of the resonance signal of the resonance stylus pen 200 toall of the second touch electrodes 302 that form the touch sensor 112(S307).

In addition, the touch controller 120 receives detection signals fromthe second touch electrodes 302 during the second driving mode section(S308), and obtains touch coordinate information (i.e., a coordinatevalue in the second coordinate axis (e.g., X-coordinate axis)) at aposition where a touch of the resonance stylus pen 200 is generated byusing the received detection signal (S309).

In addition, when the touch controller 120 enters the second idle modesection after termination of the second driving mode section (S310), thetouch controller 120 disables the driving signal output to the touchsensor 112. Meanwhile, the touch controller 120 receives detectionsignals from only the plurality of first touch electrodes 301 or fromall of the first and second touch electrodes 301 and 302 during thesecond idle mode section, and may determine the type of the touch objectthat generated the touch input by analyzing the received detectionsignal.

The touch apparatus 100 may perform continuous touch detection byrepeating S301 and S310 while the touch apparatus 100 is driven.

As described above, in the touch detection method described withreference to FIG. 11 and FIG. 12 , the same driving signal issimultaneously applied to all the first touch electrodes 301 in thefirst driving mode section, and the same driving signal issimultaneously applied to all the second touch electrodes 302 in thesecond driving mode section such that intensity of the resonance signalof the stylus pen 200, responding to the driving signal, is improved.

In addition, since the touch coordinate information is detected from thedetection signal received from the touch sensor 112 not for the idlemode during which the driving signal is not applied to the touch sensor112 but for the driving mode during which the driving signal is outputto the touch sensor 112, compared to the conventional method ofacquiring the touch coordinate information of the resonant stylus pen byreceiving the detection signal while the driving signal is not appliedby the touch sensor, the SNR of the effective signal used for touchcoordinate detection is improved, and sufficient touch signal processingtime can be secured.

FIG. 13 schematically illustrates a touch detection method according toanother exemplary embodiment of the present invention. In addition, FIG.14 illustrates an example of a driving signal output to touch electrodesaccording to the touch detection method of FIG. 13 .

The touch detection method of FIG. 13 illustrates a case that the touchapparatus 100 described with reference to FIG. 1 to FIG. 4 operates in aself-capacitive method, and may be performed by the touch controller120. In addition, a driving mode section in FIG. 13 and FIG. 14 is asection corresponding to the touch driving mode of FIG. 3 or theresonance driving mode of FIG. 5 , and an idle mode section is a sectioncorresponding to the idle modes of FIG. 3 and FIG. 5 .

Referring to FIG. 13 and FIG. 14 , the touch controller 120 enters thedriving mode section (S401), and the touch controller 120 simultaneouslyapplies a driving signal for generation of a resonance signal of theresonance stylus pen 200 to all of the first and second touch electrodes301 and 302 that form the touch sensor 112 (S402).

In addition, the touch controller 120 receives a detection signal fromall of the first and second touch electrodes 301 and 302 during thedriving mode section (S403), and obtains touch coordinate information(i.e., a coordinate value in the second coordinate axis (e.g.,X-coordinate axis) and a coordinate value in the first coordinate axis(e.g., Y-coordinate axis)) at a position where a touch of the resonancestylus pen 200 is generated by using the received detection signal(S404).

After that, when the touch controller 120 enters the idle mode sectionafter termination of the driving mode section (S405), the touchcontroller 120 disables the driving signal output to the touch sensor112. Meanwhile, the touch controller 120 receives detection signals fromonly the plurality of first touch electrodes 301 or from all of thefirst and second touch electrodes 301 and 302 during the idle modesection, and may determine the type of the touch object that generatedthe touch input by analyzing the received detection signal.

The touch apparatus 100 may perform continuous touch detection byrepeating S401 and S405 while the touch apparatus 100 is driven.

As described above, in the touch detection method described withreference to FIG. 13 and FIG. 14 , the same driving signal issimultaneously applied to all the touch electrodes 301 and 302 in thedriving mode section such that intensity of the resonance signal of thestylus pen 200, responding to the driving signal, is improved.

In addition, since the touch coordinate information is detected from thedetection signal received from the touch sensor 112 not for the idlemode during which the driving signal is not applied to the touch sensor112 but for the driving mode during which the driving signal is outputto the touch sensor 112, compared to the conventional method ofacquiring the touch coordinate information of the resonant stylus pen byreceiving the detection signal while the driving signal is not appliedby the touch sensor, the SNR of the effective signal used for touchcoordinate detection is improved, and sufficient touch signal processingtime can be secured.

FIG. 15 schematically illustrates a touch detection method according toanother exemplary embodiment of the present invention. In addition, FIG.16 illustrates an example of a driving signal output to touch electrodesaccording to the touch detection method of FIG. 15 .

The touch detection method of FIG. 15 illustrates a case that the touchapparatus 100 described with reference to FIG. 1 to FIG. 4 operates in aself-capacitive method, and may be performed by the touch controller120. In addition, a driving mode section in FIG. 15 and FIG. 16 is asection corresponding to the touch driving mode of FIG. 3 or theresonance driving mode of FIG. 5 , and an idle mode section is a sectioncorresponding to the idle modes of FIG. 3 and FIG. 5 .

Referring to FIG. 15 and FIG. 16 , the touch controller 120 enters thefirst driving mode section (S501), and the touch controller 120simultaneously applies a driving signal for generation of a resonancesignal of the resonance stylus pen 200 to all of the first and secondtouch electrodes 301 and 302 that form the touch sensor 112 (S502).

In addition, the touch controller 120 receives a detection signal fromall of the first touch electrodes 301 during the first driving modesection (S503), and obtains touch coordinate information (i.e., acoordinate value in the second coordinate axis (e.g., X-coordinateaxis)) at a position where a touch of the resonance stylus pen 200 isgenerated by using the received detection signal (S504).

After that, when the touch controller 120 enters the idle mode sectionafter termination of the driving mode section (S505), the touchcontroller 120 disables the driving signal output to the touch sensor112. Meanwhile, the touch controller 120 receives detection signals fromthe second touch electrodes 302 during the first idle mode section, andmay determine the type of the touch object that generated the touchinput by analyzing the received detection signal.

In addition, when the first idle mode section is terminated and thetouch controller 120 enters the second driving mode section (S506), thetouch controller 120 simultaneously applies a driving signal forgeneration of the resonance signal of the resonance stylus pen 200 toall of the first and second touch electrodes 301 and 302 that form thetouch sensor 112 (S507).

In addition, the touch controller 120 receives the detection signal fromthe second touch electrodes 302 during the second driving mode section(S508), and obtains touch coordinate information (i.e., a coordinatevalue in the second coordinate axis (e.g., X-coordinate axis)) at aposition where a touch of the resonance stylus pen 200 is generated byusing the received detection signal (S509)

In addition, when the touch controller 120 enters the second idle modesection after termination of the second driving mode section (S510), thetouch controller 120 disables the driving signal output to the touchsensor 112. Meanwhile, the touch controller 120 receives detectionsignals from only the plurality of first touch electrodes 301 during thesecond idle mode section, and may determine the type of the touch objectthat generated the touch input by analyzing the received detectionsignal.

The touch apparatus 100 may perform continuous touch detection byrepeating S501 and S510 while the touch apparatus 100 is driven

As described above, in the touch detection method described withreference to FIG. 15 and FIG. 16 , the same driving signal is applied toall of the touch electrodes 301 and 302 in the driving mode section suchthat intensity of the resonance signal of the resonance stylus pen,responding to the driving signal, can be improved.

In addition, since the touch coordinate information is detected from thedetection signal received from the touch sensor 112 not for the idlemode during which the driving signal is not applied to the touch sensor112 but for the driving mode during which the driving signal is outputto the touch sensor 112, compared to the conventional method ofacquiring the touch coordinate information of the resonant stylus pen byreceiving the detection signal while the driving signal is not appliedby the touch sensor, the SNR of the effective signal used for touchcoordinate detection is improved, and sufficient touch signal processingtime can be secured.

FIG. 17 illustrates another example of a touch apparatus according toanother exemplary embodiment of the present invention.

Referring to FIG. 17 , a touch apparatus 100′ includes a touch panel110′ and a touch controller 120′, and the touch panel 110′ may include asubstrate 111′ and a touch sensor (refer to reference numeral 112 ofFIG. 2 ) disposed on the substrate 111′.

The touch apparatus 100′ of FIG. 17 is a touch apparatus operating in aself-capacitive method, and the touch sensor 112 may include a pluralityof touch electrodes 301′ arranged in a dot matrix format.

A plurality of touch electrodes 301′ receive a driving signal forgeneration of a resonance signal of a resonance stylus pen (refer toreference numeral 200 of FIG. 2 ) from the touch controller 120′, andmay output a detection signal corresponding to a touch detection resultto the touch controller 120′.

The touch controller 120′ controls driving of the plurality of touchelectrodes 301′, and may output touch coordinate informationcorresponding to the touch detection result by using the detectionsignal input from the plurality of touch electrodes 301′.

FIG. 18 schematically illustrates a touch detection method according toanother exemplary embodiment of the present invention.

The touch detection method illustrated in FIG. 18 may be performed bythe touch apparatus 100′ described with reference to FIG. 17 . Inaddition, a driving mode in FIG. 18 is a section corresponding to thetouch driving mode of FIG. 3 or the resonance driving mode of FIG. 5 ,and an idle mode section is a section corresponding to the idle modes ofFIG. 3 and FIG. 5 .

Referring to FIG. 18 , a touch controller 120′ enters a driving modesection (S601), and simultaneously applies a driving signal forgeneration of a resonance signal of a stylus pen 200 to all of aplurality of touch electrodes 301′ that form a touch sensor 112 (S602).

In addition, the touch controller 120 receives a detection signal fromall of the plurality of touch electrodes 301′ during the driving modesection (S603), and obtains touch coordinate information at a positionwhere a touch of the stylus pen 200 is generated by using the receiveddetection signal (S604).

In the touch electrodes 301′ arranged in the dot matrix format,coordinate values in the corresponding first and second coordinate axesare mapped for each touch electrode. Thus, the touch controller 120 canacquire all coordinate values in the first and second coordinate axesconstituting the touch coordinate information simply by detecting thetouch electrode 301′ where the touch is generated.

After that, when the touch controller 120 enters an idle mode sectionafter termination of the driving mode section (S605), the touchcontroller 120 disables a driving signal output to the plurality oftouch electrodes 301′. Meanwhile, the touch controller 120 may receivedetection signals from the plurality of touch electrodes 301′ during theidle mode section, and determine the type of the touch object thatgenerated the touch input by analyzing the received detection signals.

The touch apparatus 100 may perform continuous touch detection byrepeating S601 and S605 while the touch apparatus 100 is driven.

As described above, in the touch detection method described withreference to FIG. 18 , the same driving signal is simultaneously appliedto all the touch electrodes 301′ in the driving mode section to therebyimprove intensity of the resonance signal of the resonance stylus pen200 responding to the driving signal.

In addition, since the touch coordinate information is detected from thedetection signal received from the touch sensor 112 not for the idlemode during which the driving signal is not applied to the touch sensor112 but for the driving mode during which the driving signal is outputto the touch sensor 112, compared to the conventional method ofacquiring the touch coordinate information of the resonant stylus pen byreceiving the detection signal while the driving signal is not appliedby the touch sensor, the SNR of the effective signal used for touchcoordinate detection is improved, and sufficient touch signal processingtime can be secured.

The detailed description above should not be construed as restrictive inall respects and should be considered as illustrative. The range of thepresent invention should be determined by rational interpretation of theattached claims, and all changes within the equivalent range of thepresent invention are included in the range of the present invention.

1. A touch apparatus comprising: a touch sensor: and a touch controllerthat operates in a resonance driving mode during which a first drivingsignal is output for generation of a resonance signal of a stylus penand an idle mode during which the outputting of the first driving signalis stopped, and obtains first touch coordinate information from adetection signal input from the touch sensor in response to the firstdriving signal, wherein the touch controller obtains an effective signalby using a baseline signal, and the detection signal output from thetouch sensor, and obtains the first touch coordinate information fromthe effective signal.
 2. The touch apparatus of claim 1, wherein thetouch controller obtains the first touch coordinate information from thedetection signal input from the touch sensor during the idle mode. 3.The touch apparatus of claim 1, wherein the touch controller determinesa type of a touch object that generated a touch input by using theeffective signal.
 4. The touch apparatus of claim 3, wherein the touchcontroller recognizes the touch object as the stylus pen when theeffective signal is a signal that corresponds to a resonance signal ofthe stylus pen.
 5. The touch apparatus of claim 1, wherein, when a touchinput with respect to the touch sensor is detected, the touch controllerdetermines a type of a touch object that generated the touch input froma detection signal input from the touch sensor during the idle mode. 6.The touch apparatus of claim 1, wherein a frequency of the first drivingsignal corresponds to a resonance frequency of the stylus pen.
 7. Thetouch apparatus of claim 6, wherein the touch controller operates in anormal driving mode during which a second driving signal of which afrequency is different from that of the first driving signal is outputto the touch sensor.
 8. The touch apparatus of claim 7, wherein thetouch controller obtains second touch coordinate information by using adetection signal input from the touch sensor during the normal drivingmode.
 9. The touch apparatus of claim 7, wherein a frequency of thefirst driving signal in the resonance driving mode is different from afrequency of the second driving signal in the normal driving mode.
 10. Atouch detection method of a touch apparatus, comprising: outputting afirst driving signal for generation a resonance signal of a stylus penduring a resonance driving mode; receiving a detection signal from thetouch sensor in response to the first driving signal; and obtainingfirst touch coordinate information from the detection signal, whereinthe obtaining of the first touch coordinate information comprises:obtaining an effective signal by using a baseline signal, and thedetection signal received from the touch sensor; and obtaining the firsttouch coordinate information from the effective signal.
 11. The touchdetection method of the touch apparatus of claim 10, wherein thereceiving the detection signal comprises receiving the detection signalfrom the touch sensor during an idle mode during which the outputting ofthe first driving signal is stopped.
 12. The touch detection method ofthe touch apparatus of claim 10, further comprising recognizing a touchobject that generated a touch input by using the effective signal. 13.The touch detection method of the touch apparatus of claim 12, whereinthe recognizing of the touch object comprises recognizing the touchobject as the stylus pen when the effective signal is a signalcorresponding to a resonance signal of the stylus pen.
 14. The touchdetection method of the touch apparatus of claim 10, further comprising,while opening in the idle mode, determining a type of a touch objectthat generated the touch input from a detection signal received from thetouch sensor.
 15. The touch detection method of the touch apparatus ofclaim 14, wherein the determining of the type of the touch objectcomprises determining the touch object as the stylus pen when thedetection signal received from the touch sensor during the idle modeincludes a signal component that corresponds to a resonance signal ofthe stylus pen.
 16. The touch detection method of claim 10, wherein afrequency of the first driving signal corresponds to a resonancefrequency of the stylus pen.
 17. The touch detection method of the touchapparatus of claim 16, further comprising: operating in a normal drivingmode during which a second driving signal of which a frequency isdifferent from the frequency of the first driving signal is output tothe touch sensor; and obtaining second touch coordinate information byusing a detection signal input from the touch sensor during the normaldriving mode.
 18. The touch detection method of the touch apparatus ofclaim 17, wherein the first driving signal in the resonance driving modehas a different frequency from a frequency of the second driving signalin the normal driving mode.